JP2000011580A - Disk cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a disk cartridge for housing a relatively small-diameter disk recording medium to deal with a plurality of different formats. SOLUTION: This disk cartridge is provided with a cartridge main body for housing a magneto-optical disk 6, a recording/reproducing opening part 16 for causing the signal recording area of the magneto-optical disk 6 to face the optical pickup devices 33 and 40 of recording/reproducing devices 31 and 32, and a shutter member 21 provided to be capable of opening/closing the recording/reproducing opening part 6. The shutter member 21 is selectively stopped in first and second opening positions different in the opening amount of the recording/reproducing opening part 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cartridge for storing a disk-shaped recording medium such as a magneto-optical disk or a magnetic disk.

[0002]

2. Description of the Related Art There is known a disk cartridge in which a disk-shaped recording medium capable of recording and / or reproducing information is stored in a cartridge body. As this type of disk cartridge, for example, a disk cartridge 201 as shown in FIG. 33 includes a cartridge main body 205 configured by combining a set of upper and lower halves, and a magneto-optical disk rotatably housed in the cartridge main body 205. 2
06.

As shown in FIGS. 33 and 34, the cartridge body 205 has a recording / reproducing device for exposing a part of the signal recording area of the magneto-optical disk 206 housed in the cartridge body 205 to the outside. Openings 207, 2
07 are provided at positions facing each other. The recording / reproducing opening 207 can be opened and closed by a shutter member 210 movably provided in the cartridge main body 205. The shutter member 210 is urged by a torsion coil spring (not shown) provided in the cartridge main body 205 in a direction to close the recording / reproducing opening 207.

When the shutter member 210 is erroneously opened in the cartridge main body 205, the magneto-optical disk 209 is opened.
In order to surely prevent the signal recording surface of the magneto-optical disk 209 from being damaged by touching the recording area with a finger or the like, a lock portion 213 for restricting the moving operation of the shutter member 210 is provided.

[0005] As shown in FIG.
The cartridge body 205 includes an engagement member 214 that engages with the shutter member 210.
It is arranged at a corner portion inside so as to be elastically displaceable. The engaging member 214 has a base end fixed in the cartridge main body 205 and an engaging claw 215 that engages with the shutter member 210 at a distal end. As shown in FIG. 36, an engagement piece 216 that engages with the engagement claw 215 of the engagement member 214 is formed integrally with the shutter member 210. The lock portion 210 is a shutter member 2 with the shutter member 210 closing the recording / reproducing opening 207.
The engaging claw 215 of the engaging member 214 is engaged with the ten engaging pieces 216, thereby restricting the opening and closing operation of the shutter member 210.

[0006] The cartridge body 205 has a structure shown in FIG.
As shown in FIG. 4, a circular table entry opening 208 is provided in the center of the lower half for entry of a turntable for rotatingly driving the magneto-optical disk 206 when loaded in the recording / reproducing apparatus. ing. In addition, as shown in FIG. 33, a display 209 indicating the loading direction of the recording / reproducing apparatus is provided on the main surface of the upper half as shown in FIG.
Is provided.

The magneto-optical disk 206 housed in the cartridge main body 205 is formed in a disk shape having a center hole as shown in FIG.
mm. The magneto-optical disk 206 has a metal center hub 206 having a flange portion in a center hole.
The center hub is exposed from the table entry opening 208 of the cartridge body 205. Although not shown, when the magneto-optical disk 206 is loaded in the recording / reproducing apparatus, the center hub 206a is attracted by a magnet provided on the turntable, and is mounted and held on the turntable.

When the disk cartridge 201 configured as described above is loaded into a recording / reproducing apparatus,
The operation of opening and closing the shutter member 210 will be described with reference to the drawings. The disk cartridge 201 shown in FIG.
As shown in (2), when loaded into the recording / reproducing device, the shutter operating member 217 provided on the recording / reproducing device side comes into contact with the engaging member 214 of the lock portion 213. As the disc cartridge 201 is further loaded into the recording / reproducing device, the operating member 218 of the shutter operating member 217 pushes the engaging member 214 of the lock portion 213 to elastically displace the engaging member 214. When the engaging member 214 is elastically displaced, the engagement state between the engaging claw 215 of the engaging member 214 and the engaging piece 216 of the shutter member 210 is released, and the movement of the shutter member 210 is stopped. Operation is enabled. As the disk cartridge 201 is further loaded into the recording / reproducing apparatus, the shutter member 210 is moved by the shutter operation member 217 to move the recording / reproducing opening 207.
Is released.

An optical disk such as a CD (compact disk) is used by being housed in a disk case 220 as shown in FIG. As shown in FIG. 37, the disk case 220
Case body 225 having storage portion 227 for storing
And a lid 228 provided in the storage section of the case body 225 so as to be openable and closable.

A lid 228 is provided in the case body 225 so as to be openable and closable in order to insert and remove the optical disk 226 housed in the case. In the lid 228,
A disk holding member 229 for holding the center of the optical disk 226 is provided at the center of the inner main surface. The lid 228 is held in a closed state with respect to the case body 225 by being engaged with the engagement claws 231 and 231 provided on the case body 225.

As shown in FIG. 38, the case main body 225 has a central portion on the bottom surface for entering a turntable for rotating the optical disk 226 when the optical disk 226 is loaded in the recording / reproducing apparatus. Opening 235 is provided. As shown in FIGS. 38 and 39, the case main body 235 has a recording / reproducing opening for exposing the signal recording area of the optical disk 226 stored in the storage to the recording / reproducing means of the recording / reproducing apparatus. 236 is formed over the radial direction of the optical disk 226. The recording / reproducing opening 236 is connected to the table entry opening 235.
It is installed continuously.

As shown in FIG. 38, the recording / reproducing opening 236 can be opened and closed by a shutter member 232 movably provided in the case main body 225. As shown in FIGS. 37 and 38, the shutter members 232 are movably provided on both sides of the case body 225 in the width direction. Also, as shown in FIG.
5 shows a display 23 indicating the loading direction with respect to the recording / reproducing device.
3 are provided.

[0013]

As described above, the conventional disk cartridge 201 and the disk case 22
0 indicates that the opening area of the recording / reproducing openings 207, 236 is always constant when the shutter members 210, 233 open the recording / reproducing openings 207, 236 in any case. In addition, these conventional disk cartridges 2
10 and / or the disk case 220 holds the shutter member 2 with the recording / reproducing openings 207 and 236 opened.
10, 233 are accommodated in the projected area of the main surface of the cartridge main body 205 or the case main body 235.

In the above-described disk cartridge, large and small disc-shaped recording media having the same specifications such as the format and the like and having different diameters are placed in a substantially similar large and small cartridge body having substantially the same structure. Each may be stored and used. That is, when used indoors at home or the like, a large capacity is secured by a large-sized disk cartridge containing a large-diameter disc-shaped recording medium using a stationary recording / reproducing apparatus. When used outdoors, a portable recording / reproducing apparatus is used, and portability is improved by a small disk cartridge containing a small-diameter disc-shaped recording medium.

Therefore, the stationary recording / reproducing apparatus is configured to use both large and small disk cartridges, and the portable recording / reproducing apparatus is adapted to use only small disk cartridges. It is configured.

The stationary recording / reproducing apparatus is, for example, a CD (compact disc), a CD-R (Record
able), CD-RW (ReWritable), DVD (Digital Ve
It is necessary to be able to reproduce a plurality of optical discs having different format specifications such as a rsatile disc. Therefore, the recording / reproducing apparatus is required to record and reproduce data in at least two types of formats, ie, a format unique to a disc cartridge to be recorded / reproduced and a conventional format. It is necessary to provide an optical pickup device having the objective lens.

However, when the optical pickup device is configured to have a plurality of objective lenses, the size of the optical pickup device is increased according to the number of objective lenses. For this reason, when the disk cartridge is compatible with a stationary recording / reproducing device, the width of the recording / reproducing opening facing a plurality of objective lenses of an optical pickup device for recording / reproducing information on / from a disc-shaped recording medium is increased. It needs to be formed.

On the other hand, in the case of a portable recording / reproducing apparatus, it is generally sufficient that the disc cartridge only needs to be able to record / reproduce a unique format. Therefore, only one objective lens is required. The width of the opening is made relatively small corresponding to one objective lens.

Further, when there is at least a large and small disc-shaped recording medium having different diameters, the turntable for rotating the disc-shaped recording medium can reduce the runout on the outer peripheral side of the turntable as the outer diameter becomes smaller.

In addition, the larger the diameter of the disk-shaped recording medium, the greater the deflection on the outer peripheral side. For this reason, it is preferable that the outer diameter of the turntable be large.

Therefore, in the disk cartridge,
In the case of supporting a stationary recording / reproducing apparatus, a table entry opening at a central portion facing a chucking portion that moves toward and away from the turntable is formed to have a dimension that allows a large-diameter turntable to enter, In the case of supporting a portable recording / reproducing apparatus, it is only necessary that the table entry opening is formed in a size that allows a small-diameter turntable to enter.

The large-diameter disc cartridge has an area on the main surface of the cartridge body in which both the recording / reproducing opening and the table entry opening can be formed large. However, the small-diameter disk cartridge has a disadvantage that it is difficult to form the recording / reproducing opening and the table entrance opening large and make the shutter member large since the main surface of the cartridge body is relatively small. . That is, the small-diameter disk cartridge has a relatively large recording / reproducing opening and a table entry opening, so that the shutter member for opening and closing the recording / reproduction opening and the table entry opening becomes large. When the recording / reproducing opening and the table entry opening are opened, there is a disadvantage that the shutter member protrudes from the projected area of the main surface of the cartridge body. Therefore, according to the small-diameter disk cartridge, since the projection protrudes from the cartridge main body when the shutter member is opened, the recording / reproducing opening and the table-entering opening are formed large. It becomes difficult to convert.

Accordingly, the present invention provides a disk cartridge in which a relatively large recording / reproducing opening and a shutter member can be provided in a cartridge main body in which a relatively small-diameter disk-shaped recording medium is stored. The purpose is to provide.

[0024]

In order to achieve the above-mentioned object, a disk cartridge according to the present invention has a signal recording area of a disc-shaped recording medium exposed to a recording and / or reproducing means of a recording and / or reproducing apparatus. An opening for recording and / or reproduction for closing, and a shutter member provided to open and close the opening for recording and / or reproduction are provided. And
The shutter member records and / or reproduces during recording and / or reproduction.
Alternatively, it is selectively stopped at a plurality of open positions where the opening amounts of the reproduction openings are different.

According to the disk cartridge constructed as described above, when recording and / or reproduction is performed, the shutter member is moved to a plurality of open positions with respect to the recording and / or reproduction opening. The opening area of the recording and / or reproducing opening is selectively changed according to each opening position.

Further, the disk cartridge according to the present invention has a recording and / or reproducing opening for exposing a signal recording area of a disc-shaped recording medium to recording and / or reproducing means on a recording and / or reproducing apparatus side. An opening for driving a disk-shaped recording medium into the cartridge body, and a shutter member for opening and closing the recording and / or reproducing opening and the opening. Prepare. Then, the shutter member is selectively stopped at a plurality of open positions for varying the opening amounts of the entrance openings during recording and / or reproduction.

According to the disk cartridge constructed as described above, the shutter member is moved to the plurality of open positions with respect to the entrance opening when recording and / or reproduction is performed, so that each open position is obtained. The opening area of the entrance opening is selectively changed in accordance with the condition.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a specific embodiment of the present invention will be described with reference to the drawings. As a disk cartridge according to the present invention, a small-diameter disk cartridge and a large-diameter disk cartridge accommodating two types of large and small types of magneto-optical disks having the same specifications such as formats and different diameters will be described.

First, a small-diameter disk cartridge having a relatively small outer shape will be described with reference to the drawings. As shown in FIG. 1, the small-diameter disk cartridge 1 includes a magneto-optical disk 6 and a cartridge body 11 that houses the magneto-optical disk 6 therein.

The magneto-optical disk 6, as shown in FIG.
It has a central hole and is formed, for example, with a diameter of 80 mm.
In the center hole of the magneto-optical disk 6, a metal center hub 6a is provided.

The cartridge body 11 is formed in a generally thin box shape by abutting and joining substantially circular upper and lower halves made of, for example, a resin material.

As shown in FIG. 2, the cartridge main body 11 has a table entry opening 15 through which a turntable of the recording / reproducing apparatus for rotating the magneto-optical disk 6 enters the cartridge main body 11, and a recording / reproducing apparatus. It has a recording / reproducing opening 16 for allowing a part of the signal area of the magneto-optical disk 6 to face the recording / reproducing means on the side.

The table entry opening 15 is formed in a substantially circular shape at the center of the main surface of the lower half. When the small-diameter disc cartridge 1 is loaded in the recording / reproducing apparatus,
The turntable of the recording / reproducing apparatus enters the cartridge body 11 through the table entry opening 15. Although not shown, the small-diameter disk cartridge 1 has a positioning portion provided on the turntable inserted into a center hole of the magneto-optical disk 6, and a magnet disposed at the tip of the positioning portion. Center hub 6a
Is held by suction. Then, the magneto-optical disk 6 is placed on the turntable.

The recording / reproducing openings 16 are formed on the main surface of the cartridge body 11, on the outer peripheral side of the table entry opening 15, at positions opposed to each other in the radial direction of the magneto-optical disk 6. ing.

As shown in FIG. 3, the width of the recording / reproducing opening 16 in the direction perpendicular to the direction in which the small-diameter disc cartridge 1 is loaded into the recording / reproducing apparatus is relatively small having only one objective lens. of which is greater than the width sufficient W ₁ to the optical pickup device moves, relatively large optical pickup apparatus having two objective lenses are formed to a sufficient width W ₂ to move .

As shown in FIGS. 1, 2 and 3, the cartridge main body 11 is provided with a shutter mechanism 18 for opening and closing the recording / reproducing opening 16. The shutter mechanism 18
A shutter member 21 for opening and closing the recording / reproducing opening 16;
A torsion coil spring (not shown) for urging the shutter member 21 in a direction to close the recording / reproducing opening 16 is provided.

The shutter member 21 has a substantially U-shaped cross section. The shutter members 22 have a substantially rectangular shape for opening and closing the recording / reproducing opening 16.
And a connecting plate 23 for connecting one ends of the two. The shutter plate 22 has an area sufficient to close the recording / reproducing opening 16.

Although not shown, the torsion coil spring is
One end is in contact with the inner wall of the cartridge body 11 and the other end is in contact with the shutter member 21, and is disposed inside the cartridge body 11. Therefore, the shutter member 21 is actuated by the urging force of a not-shown torsion coil spring.
It is urged in a direction to close the recording / reproducing opening 16.

A guide recess 25 for guiding the movement of the shutter member 21 is formed on the main surface of the cartridge body 11 over the movement area of the shutter member 21. The guide recess 25 is formed such that one end in the movement direction of the shutter member 21 is opened on the side surface of the cartridge body 11. Therefore, the shutter member 21 can protrude from the side surface of the cartridge body 11 when the recording / reproducing opening 16 is fully opened. The cartridge body 11 has a front side facing the recording / reproducing apparatus,
While guiding the connecting plate 23 of the shutter member 21,
A guide recess 26 with which the tip of the shutter operation arm on the recording / reproducing apparatus slides is formed.

As shown in FIGS. 1 and 3, the cartridge main body 11 is provided on the main surface of the upper half thereof with a display 28 such as an arrow indicating the loading direction of the recording / reproducing apparatus. As shown in FIG. 2, the cartridge main body 11 is provided with positioning holes 29a and 29b on both sides in the width direction for positioning the cartridge main body 11 at a predetermined loading position in the recording / reproducing apparatus. Further, the small-diameter disk cartridge 1 is provided with a display label 30 on the main surface and the rear side surface of the cartridge main body 11 for displaying recorded contents and the like.

The operation of the shutter member 21 for opening and closing the recording / reproducing opening 16 and the table entry opening 15 in the small-diameter disk cartridge 1 configured as described above will be described with reference to the drawings.

First, the case where the small-diameter disk cartridge 1 is loaded in a portable recording / reproducing apparatus will be described with reference to the drawings. As shown in FIG. 4, in the portable recording / reproducing apparatus 31, an optical pickup device 33 provided with only one objective lens 34 is movably provided as a recording / reproducing means. The optical pickup device 33 is supported over a drive shaft 36 and a guide shaft 37 provided in parallel with each other along the moving direction. Further, the portable recording / reproducing apparatus 31 is provided with a turntable 38 on which the magneto-optical disk 6 is placed, which is located at one end of the moving area of the optical pickup device 35.

When the small-diameter disk cartridge 1 is loaded into the portable recording / reproducing apparatus 31, the cartridge main body 1
Shutter member 21 with respect to the recording / reproducing opening 16
Stops at the first open position corresponding to the optical pickup device 33. That is, the recording / reproducing opening 16 is
As shown in FIG. 5, the shutter member 21 of the portable recording / reproducing device 31 is moved and operated, and the shutter member 21 is stopped at the first open position, so that the shutter member 21 is in a half-open state. The opening amount in the moving direction is width W
_Has been set to ₁ .

The small-diameter disk cartridge 1 is
When the shutter member 21 opens the recording / reproducing opening 16 at the first open position, the shutter member 21 does not project from the side surface of the cartridge body 11. Therefore,
The portable recording / reproducing device 31 can be downsized.

Although not shown, in the small-diameter disk cartridge 1, an adverse effect caused by one end of the shutter member 21 protruding from the cartridge main body 11 according to the empty space of the cartridge loading section in the portable recording / reproducing apparatus 31. If the projection amount is too small, the shutter member 2
One end may be configured to slightly protrude.

Next, a case where the small-diameter disk cartridge 1 is loaded in a stationary recording / reproducing apparatus will be described with reference to the drawings. As shown in FIG. 6, an optical pickup device 40 having two objective lenses 41 and 42 as recording / reproducing means is provided in a stationary recording / reproducing device 32.
Are movably arranged. Optical pickup device 40
As shown in FIGS. 6 and 7, first and second objective lenses 41 and 42 are provided in parallel in the width direction of the recording / reproducing opening 16. Further, the optical pickup device 40 is supported across a drive shaft 43 and a guide shaft 44 provided in parallel with each other along the moving direction. Further, the stationary recording / reproducing device 32 is located at one end side of the moving area of the optical pickup device 40,
A turntable 45 on which the magneto-optical disk 6 is placed is provided.

When the small-diameter disk cartridge 1 is loaded into the stationary recording / reproducing device 32, the recording / reproducing device 3
The moving operation is performed by the second shutter operation arm 46,
The shutter member 21 is stopped at the second open position corresponding to the optical pickup device 40 with respect to the recording / reproducing opening 16 of the cartridge body 11.

That is, the recording / reproducing opening 16 is
When the shutter member 21 stops at the second open position as shown in FIG.
Opening of the moving direction is the width W ₂ of the.

The small-diameter disk cartridge 1
The shutter member 21 projects from the side surface of the cartridge main body 11 with the shutter member 21 opening the recording / reproducing opening 16 at the second opening position. However, the stationary recording / reproducing device 32 has a
Since it is relatively easy to secure an empty space for accommodating the projecting portion at one end of the shutter member 21, there is no adverse effect due to the projecting end of the shutter member 21.

Therefore, the small-diameter disc cartridge 1
Is a shutter member 2 depending on the recording / reproducing device to be loaded.
By stopping 1 in the first or second open position,
The opening amount of the recording / reproducing opening 16 can be switched.

As described above, the small-diameter disk cartridge 1 has the shutter member 2 with respect to the recording / reproducing opening 16.
1 can be moved to the first and second open positions in two steps, so that not only the optical pickup device 33 having one objective lens 34 but also the two objective lenses 4
It is possible to support the optical pickup device 40 having the optical pickup devices 1 and 42. That is, the small-diameter disk cartridge 1 can correspond to a plurality of different formats and the like, and the portable recording / reproducing device 31 can be downsized.

Next, a large-diameter disk cartridge having the same specifications as the small-diameter disk cartridge 1 in the format and the like will be described with reference to the drawings. As shown in FIGS. 8 and 9, the large-diameter disk cartridge 2
Since the configuration is substantially the same as that of the small-diameter disk cartridge 1, members having the same configuration will be briefly described.

As shown in FIGS. 8, 9 and 10, the large-diameter disk cartridge 2 includes a magneto-optical disk 7 and a cartridge body 11 for accommodating the magneto-optical disk 7 therein.

The magneto-optical disk 7, as shown in FIG.
It has a central hole and is formed, for example, with a diameter of 120 mm. In the center hole of the magneto-optical disk 7, a metal center hub 7a is provided.

The cartridge main body 51 is formed in a generally thin box shape by abutting and joining substantially circular upper and lower halves formed of, for example, a resin material.

As shown in FIG. 9, the cartridge main body 51 has a table entry opening 55 through which a turntable of the recording / reproducing apparatus rotating the magneto-optical disk 7 enters the cartridge main body 51, and a recording / reproducing apparatus. And a recording / reproducing opening 56 for allowing a part of the signal area of the magneto-optical disk 7 to face the recording / reproducing means on the side.

The table entry opening 55 is formed in a substantially circular shape at the center of the main surface of the lower half. When the large-diameter disk cartridge 2 is loaded in the recording / reproducing device,
The turntable on the recording / reproducing apparatus enters the cartridge main body 51 from the table entry opening 55. Although not shown, the small-diameter disk cartridge 1 has a positioning portion provided on the turntable inserted into a center hole of the magneto-optical disk 7, and a magnet disposed at the tip of the positioning portion. Center hub 7a
Is held by suction. Then, the magneto-optical disk 7 is placed on the turntable.

The recording / reproducing openings 56 are formed on the main surface of the cartridge body 51, on the outer peripheral side of the table entry opening 55, at positions opposing each other in the radial direction of the magneto-optical disk 7. ing.

The recording / reproducing opening 56 is formed as shown in FIG.
As shown in the figure, the width in the direction orthogonal to the direction in which the large-diameter disc cartridge 2 is loaded into the recording / reproducing apparatus has a width W ₂ sufficient for moving a relatively large-sized optical pickup device having two objective lenses. Is formed.

As shown in FIGS. 8, 9 and 10, the cartridge main body 51 is provided with a shutter mechanism 58 for opening and closing the recording / reproducing opening 56. Shutter mechanism 18
A shutter member 61 for opening and closing the recording / reproducing opening 56;
And a torsion coil spring (not shown) for urging the shutter member 61 in a direction to close the recording / reproducing opening 56.

The shutter member 61 has a substantially U-shaped cross section. The shutter members 61 have substantially rectangular shapes for opening and closing the recording / reproducing opening 56.
And a connecting plate 63 for connecting one ends of the two. The shutter plate 62 has an area sufficient to close the recording / reproducing opening 66.

Although not shown, the torsion coil spring is
One end of the cartridge body 5 is inserted into the cartridge body 51.
1 and the other end of the shutter member 6
1 and is disposed in contact therewith. Therefore, the shutter member 61 is urged in a direction to close the recording / reproducing opening 56 by the urging force of a not-shown torsion coil spring.

A guide recess 65 for guiding the movement of the shutter member 61 is formed on the main surface of the cartridge body 51 over the movement area of the shutter member 61. A guide recess 66 is formed on the front side of the cartridge body 51 facing the recording / reproducing device, for guiding the connecting plate 63 of the shutter member 61 and slidingly contacting the tip of the shutter operating arm on the recording / reproducing device side. I have.

As shown in FIGS. 8 and 10, the cartridge main body 51 is provided on the main surface of the upper half thereof with a display 68 such as an arrow indicating the loading direction of the recording / reproducing apparatus. As shown in FIG. 9, positioning holes 69a and 69b for positioning the cartridge main body 51 at a predetermined loading position in the recording / reproducing apparatus are provided on both sides in the width direction.
Are provided respectively. Further, the large-diameter disk cartridge 2 is provided with a display label 70 on the main surface and the rear side surface of the cartridge main body 51 for displaying recorded contents and the like.

The operation of the shutter member 61 for opening and closing the recording / reproducing opening 56 and the table entry opening 55 in the large-diameter disk cartridge 2 configured as described above will be described with reference to the drawings. The large-diameter disk cartridge 2 is applied to only the stationary recording / reproducing device 32 described above to perform recording / reproducing.

When the large-diameter disk cartridge 2 is loaded into the stationary recording / reproducing device 32, the shutter member 6 is inserted into the recording / reproducing opening 56 of the cartridge body 51.
1 stops at the open position corresponding to the optical pickup device 40. That is, as shown in FIG. 11 and FIG. 12, when the shutter member 61 is fully opened, the opening amount in the moving direction of the shutter member 61 has a width W _2.
It has been.

Then, the large-diameter disk cartridge 2
With the shutter member 61 having the recording / reproducing opening 56 opened, the shutter member 6 is opened from the side of the cartridge body 51.
1 is not protruded.

Next, another disk cartridge according to the present invention will be described below with reference to the drawings. As other disk cartridges, a small-diameter disk cartridge and a large-diameter disk cartridge that respectively house two types of large and small magneto-optical disks having different diameters housed in the cartridge body will be described.

First, as shown in FIGS. 13, 14 and 15, the small-diameter disk cartridge 3 includes a magneto-optical disk 8 as an information recording medium and a cartridge body 81 for accommodating the magneto-optical disk 8 therein. Have.

The magneto-optical disk 8 has a center hole as shown in FIG. 15, and is formed, for example, to have a diameter of 80 mm. In the center hole of the magneto-optical disk 8, a metal center hub 8a is provided.

As shown in FIG. 16, the cartridge body 81 is formed by combining and combining a flat upper shell 82 formed of, for example, a resin material and a lower shell 83 formed in a substantially box shape. ing. The cartridge main body 81 has a front side surface in the loading direction with respect to the recording / reproducing device formed in an arc shape along the outer shape of the magneto-optical disk 8 housed therein. As shown in FIG. 16, the upper shell 82 of the cartridge main body 81 has a circular guide for guiding the center hub 8a of the magneto-optical disk 8 housed at a substantially central portion on the inner main surface. Recess 84
Are formed.

As shown in FIGS. 14 and 16, the cartridge main body 81 has a table entry opening 85 through which the turntable of the recording / reproducing apparatus for rotating the magneto-optical disk 8 enters the cartridge main body 81. And a recording / reproducing opening 86 for allowing a part of the signal recording area of the magneto-optical disk 8 to face recording / reproducing means on the recording / reproducing apparatus side.

The table entry opening 85 is provided with the lower shell 8.
3 is formed in a substantially circular shape at the center of the main surface. When the small-diameter disc cartridge 3 is loaded into the recording / reproducing apparatus, the turntable on the recording / reproducing apparatus side enters the cartridge main body 81 from the table entry opening 85. Although not shown, the small-diameter disk cartridge 3 has a positioning portion provided on the turntable inserted into a center hole of the magneto-optical disk 8, and the center of the magneto-optical disk is moved by a magnet disposed at the tip of the positioning portion. Hub 8
a is held by suction. Then, the magneto-optical disk 8 is placed on the turntable.

As shown in FIG. 16, the recording / reproducing opening 86 is formed in the lower shell 83 in the radial direction of the magneto-optical disk 8, and one end thereof is connected to the table entrance opening 85. Have been.

As shown in FIG. 16, the magneto-optical disk 8 has a maximum radius in the direction perpendicular to the direction in which the small-diameter disk cartridge 3 is loaded into the recording / reproducing apparatus. relatively small and the turntable is larger than sufficient radius R ₁ to enter, sufficient to relatively large turntable magneto-optical disc 9 to be described later is mounted enters radius R that
₂ is formed.

FIG. 14, FIG.
As shown in FIGS. 6 and 17, a shutter mechanism 88 for opening and closing the recording / reproducing opening 86 is provided. Shutter mechanism 8
8 is a shutter member 91 for opening and closing the recording / reproducing opening 86.
And a compression coil spring 92 that urges the shutter member 91 in a direction to open and close the recording / reproducing opening 86.

The shutter member 91 is movably disposed in a guide recess 87 provided in the lower shell 83, as shown in FIG. The shutter member 91 includes a first closing portion 93 having a substantially rectangular plate shape that opens and closes the table entrance opening 85 and the recording / reproducing opening 86, and the first closing portion 9.
A second closing portion 9 bulged in a substantially semicircular shape at the side end on the moving direction side of 3 to open and close the table entry opening 85.
And 4.

As shown in FIG. 17, a guide projection 96 which movably engages with the cartridge body 81 is provided on the surface facing the bottom of the lower shell 83 in the first closing portion 93, as shown in FIG.
The shutter member 91 is integrally formed in parallel with the moving direction. As shown in FIGS. 17 and 18, the lower shell 83 has a guide groove 97 in which a guide projection 96 of the shutter member 91 is engaged. One end is open.
In this guide groove 97, as shown in FIG.
A stopper protrusion 98 for stopping the movement of the opened shutter member 91 is integrally formed so as to protrude.

The first closing portion 9 of the shutter member 91
17, a sliding groove 99 in which the stopper projection 98 of the lower shell 83 slides is provided in parallel with the moving direction of the shutter member 91, as shown in FIG. This sliding groove 99 is
One end opens to one end of the first closing portion 93,
The other end is provided across one end of the guide projection 96. That is, when the shutter member 91 is opened, as shown in FIG.
Abutting portion 96a against which the tip of stopper projection 98 is abutted
Are formed.

The shutter member 91 has a first closing portion 93 with a first U-shaped cross section for guiding the movement of the cartridge body 81 by sandwiching the front end of the cartridge body 81 inward. Guide portion 101 is formed. This first
As shown in FIG. 19, the guide portion 101 is formed so as to be curved along the front side surface of the cartridge main body 81, and has an engaging claw 104 that engages with the lower shell 83 at the tip end.
Are integrally formed so as to protrude in parallel with the moving direction of the shutter member 91. 17, on the main surface of the lower shell 83, adjacent to the front side surface, in parallel with the moving direction of the shutter member 91, the engaging claw 104 of the first guide portion 101 is provided.
Is formed with an engagement groove 105 with which is engaged. The first guide portion 101 is provided with a mounting hole 106 to which one end of a compression coil spring 92 for urging the shutter member 91 is mounted.

The second closing portion 9 of the shutter member 91
4 includes a lower shell 83 as shown in FIGS.
The second guide portion 102 in the form of a flat plate engaging with the shutter member 91 is integrally extended in the moving direction of the shutter member 91. This second
As shown in FIG. 17, a guide protrusion movably engages with the lower shell 83 along a moving direction of the shutter member 91 on a surface facing the bottom surface of the lower shell 83 as shown in FIG. 108 are integrally formed.

The guide projection 1 of the second guide portion 102 of the shutter member 91 is provided in the guide recess 87 of the lower shell 83.
A guide groove 109 with which the shutter 08 engages is formed in parallel with the moving direction of the shutter member 91. In the lower shell 83,
An engagement piece 110 that engages with the second guide portion 102 in a so-called undercut state is formed integrally and in parallel with the guide groove 109.

On the main surface of the lower shell 83, as shown in FIG. 17, a spring accommodating groove 112 which is curved in a substantially arc shape along the front side surface of the lower shell 83 is formed continuously with the guide groove 109. A spring mounting pin 113 to which one end of the compression coil spring 92 is mounted is provided at one end of the spring housing groove 112. One end of the compression coil spring 92 is attached to the spring attachment pin 113 in the spring accommodation groove 112, and the other end is attached to the spring attachment hole 106 of the shutter member 91.
It is arranged to be elastically displaceable inside.

Further, as shown in FIG. 19, the shutter mechanism 88 is provided on the first guide portion 181 of the shutter member 91.
The lock unit 115 includes a lock unit 115 that restricts the movement of the shutter member 91. As shown in FIGS. 19 and 20, the lock portion 115 is a regulating member 1 that regulates the movement of the shutter member 91.
17, a support shaft 118 that rotatably supports the regulating member 117, and a compression coil spring 119 that urges the regulating member 117 in a direction in which the regulating member 117 engages with the cartridge body 81.

The restricting member 117 is formed substantially in the shape of a letter, and has an engaging claw 121 for engaging with the cartridge body 81 at one end. In the cartridge body 81,
The engaging claw 1 of the regulating member 117 is provided on the front side surface of the lower shell 83.
An engagement groove 122 with which the engagement is made is formed. Also,
An operation piece 124 for rotating the other end is formed integrally with the regulating member 117. First guide part 10
1, a notch 125 is formed at a position facing the operation piece 124 of the regulating member 117 so that the operation piece 124 of the regulation member 117 faces outward.

The support shaft 118 is provided inside the first guide portion 101 of the shutter member 91, and is provided with a regulating member 117.
Is rotatably supported at a substantially central portion thereof. One end of the compression coil spring 119 is in contact with the regulating member 117 inside the first guide portion 101, and the other end is the shutter member 91.
The first guide portion 101 is disposed so as to contact the inner peripheral wall of the first guide portion 101.

The shutter mechanism 88 configured as described above
The operation of restricting the shutter member 91 and the operation of releasing the restricted state of the lock portion 115 will be described with reference to the drawings. First, as shown in FIGS. 20 and 21, the lock portion 115 is inserted into the engagement groove 122 of the cartridge body 81.
The engaging claw 121 of the regulating member 117 is engaged, and the opening and closing operation of the shutter member 91 is disabled.

As shown in FIGS. 20 and 21, when the small-diameter disc cartridge 3 is loaded in the recording / reproducing apparatus,
The shutter operation arm 128 on the recording / reproducing apparatus side moves in the direction of the arrow a in FIG. 20 to approach the first guide portion 101 of the shutter member 91 and approaches the first guide portion 101. The protrusion 129 is the first
Is inserted into the notch 125 of the guide unit 101.

As shown in FIG. 22, the shutter mechanism 88 operates the regulating member 117 by inserting the operation protrusion 129 of the shutter operation arm 128 into the notch 125 of the first guide part 101. The piece 124 is pressed. The lock portion 115 is provided with an operation piece 124 of the regulating member 117.
Is pressed, the rotation is made about the support shaft 118 as a rotation fulcrum, and the engagement state between the engagement claw 121 and the engagement groove 122 of the cartridge main body 81 is released.

Then, as shown in FIGS. 22 and 23, the shutter member 91 is moved relative to the cartridge main body 81 by the movement of the operation projection 129 of the shutter operation arm 128 in the direction of the arrow b in FIGS. To open the recording / reproducing opening 85 and the table entry opening 86 by a predetermined amount according to the radius of the turntable.

Further, the cartridge main body 81 has the structure shown in FIG.
As shown in the figure, on the main surface of the upper shell 82, a display 131 such as an arrow indicating the loading direction of the recording / reproducing apparatus is provided. As shown in FIG. 14, the cartridge body 81 has positioning holes 132a, 13 for positioning at predetermined loading positions in the recording / reproducing apparatus on both sides in the width direction.
2b are provided respectively. Further, the small-diameter disk cartridge 3 has a display label 13 on the main surface and the rear side surface of the cartridge main body 81 for displaying the recorded contents and the like.
3a and 133b are provided respectively.

The operation of the shutter member 91 for opening and closing the recording / reproducing opening 86 and the table entry opening 85 in the small-diameter disk cartridge 3 configured as described above will be described with reference to the drawings.

First, the case where the small-diameter disc cartridge 3 is loaded in a portable recording / reproducing apparatus will be described with reference to the drawings. As shown in FIG. 24, in the portable recording / reproducing apparatus 135, an optical pickup device 137 having an objective lens 138 is movably disposed. The optical pickup device 137 is supported across a drive shaft 139 and a guide shaft 140 provided in parallel with each other along the movement direction. The portable recording / reproducing apparatus 135 includes a turntable 14 on which the magneto-optical disk 8 is mounted, which is located at one end of the moving area of the optical pickup device 137.
1 is provided. The turntable 141 of the portable recording / reproducing apparatus 135 is formed to have a radius S ₁ corresponding to the outer diameter of the magneto-optical disk 8.

First, when the small-diameter disk cartridge 3 is loaded in the portable recording / reproducing apparatus 135 described above, the shutter member 91 corresponds to the turntable 141 with respect to the table entry opening 85 of the cartridge body 81. Stop at the first open position. That is, as shown in FIG. 24 and FIG. 25, the table entry opening 85 is in a half-open state when the shutter member 91 stops at the first opening position, and the opening amount of the shutter member 91 in the moving direction is reduced. is the radius R ₁ (width to one end of the shutter member 91 moves from the center of the magneto-optical disk 8 which is parallel to the moving direction of the shutter member 91) that than the radius S ₁ is the large turntable 141 You.

In the small-diameter disk cartridge 3, when the shutter member 91 is in the first open position,
The second closing portion 94 of the shutter member 91 protrudes from the side surface of the cartridge main body 81 in a state where is opened. However, since the protruding amount is relatively small, miniaturization of the portable recording / reproducing apparatus 135 can be ensured. it can.

Next, a case where the small-diameter disk cartridge 3 is loaded in a stationary recording / reproducing apparatus will be described with reference to the drawings. As shown in FIG. 26, an optical pickup device 143 having an objective lens 144 as a recording / reproducing means is movably provided in the stationary recording / reproducing device 136. Optical pickup device 143
As shown in FIG. 26, is supported over a drive shaft 145 and a guide shaft 146 provided in parallel with each other along the movement direction. The stationary recording / reproducing apparatus 136 is provided with a turntable 147 on one side of the moving area of the optical pickup device 143, on which the magneto-optical disk 8 is placed. Turntable 147 in which the recording and reproducing apparatus 136 of the stationary comprises is formed radially S ₂ corresponding to the outer diameter of the magneto-optical disc 9 to be described later.

When the small-diameter disk cartridge 3 is loaded into the stationary recording / reproducing apparatus 136, the shutter member 91 is moved to the table entrance opening 85 of the cartridge main body 81 by the second member corresponding to the optical pickup device 143.
Stop at the open position of.

That is, the table entry opening 85 is
As shown in FIGS. 26 and 27, when the shutter member 21 stops at the second open position, the shutter member 21 is fully opened,
Opening of the moving direction of the shutter member 21, and the center of the radius (magneto-optical disk 8 that is larger than the radius S ₂ of the turntable 147, the shutter member 91 between the one end of the shutter member 91 moved there is a direction parallel to the moving width) R _2.

Then, the small-diameter disk cartridge 1
The shutter member 21 projects from the side surface of the cartridge main body 11 with the shutter member 21 opening the recording / reproducing opening 16 at the second opening position. However, the stationary recording / reproducing device 32 has a
Since it is relatively easy to secure an empty space for accommodating the projecting portion at one end of the shutter member 21, there is no adverse effect due to the projecting end of the shutter member 21.

Therefore, the small-diameter disc cartridge 1
As shown in FIGS. 28, 29, and 30, the shutter member 91 is switched to the first or second open position in accordance with the recording / reproducing device to be loaded, and the table entry opening 8 is opened.
5 is switched.

Next, a large-diameter disk cartridge having the same specifications as the small-diameter disk cartridge in the format and the like will be described with reference to the drawings. As shown in FIGS. 31 and 32, the large-diameter disc cartridge 4
Is almost the same in configuration as the small-diameter disk cartridge 3, and the members having the same configuration will be briefly described.

As shown in FIGS. 31 and 32, the large-diameter disk cartridge 4 includes a magneto-optical disk 9 serving as an information recording medium, and a cartridge body 151 for accommodating the magneto-optical disk 9 therein.

As shown in FIG. 32, the magneto-optical disk 9 has a center hole and is formed, for example, to have a diameter of 120 mm. In the center hole of the magneto-optical disk 9, a center hub 9a made of metal is provided.

As shown in FIG. 31, the cartridge body 151 is formed by combining and combining a flat upper shell formed of, for example, a resin material and a lower shell formed in a substantially box shape. . The front side of the cartridge body 151 in the loading direction with respect to the recording / reproducing device is formed in an arc shape along the outer shape of the magneto-optical disk 9 housed therein.

As shown in FIG. 32, the cartridge main body 151 has a table entry opening 155 through which a turntable of the recording / reproducing device for rotating the magneto-optical disk 9 enters the cartridge main body 151, and a recording / reproducing apparatus. It has a recording / reproducing opening 156 for allowing a part of the signal recording area of the magneto-optical disk 9 to face the recording / reproducing means on the device side.

The table entry opening 155 is formed in a substantially circular shape at the center of the main surface of the lower shell. When the large-diameter disc cartridge 4 is loaded into the recording / reproducing apparatus, the turntable on the recording / reproducing apparatus side enters the cartridge main body 151 from the table entry opening 155. The recording / reproducing opening 156 is, as shown in FIG.
The lower shell is formed in the radial direction of the magneto-optical disk 9, and has one end connected to the table entry opening 155.

The table entry opening 155 is
As shown in FIG. 32, the relatively large turntable 147 on which the magneto-optical disk 9 is mounted enters the maximum width radius of the recording / reproducing apparatus in the direction orthogonal to the direction in which the large-diameter disk cartridge 4 is loaded. The radius R ₂ is sufficient.

As shown in FIG. 32, the cartridge body 151 is provided with a shutter mechanism 158 for opening and closing the recording / reproducing opening 156. The shutter mechanism 158 includes a shutter member 161 that opens and closes the recording / reproducing opening 156, and a compression coil spring (not shown) that urges the shutter member 161 in a direction that opens and closes the recording / reproducing opening 156. The shutter member 161 is, as shown in FIG.
It is movably disposed in a guide recess 157 provided in the lower shell.

The shutter member 161 has a first closed end 93 with a first U-shaped section for guiding the movement of the cartridge body 151 by sandwiching the front end of the cartridge body 151 inward. Guide portion 171 is formed. The shutter member 161 has a cartridge body 151.
Plate-shaped second guide portion 172 movably engaged with the second guide portion 172
Are integrally extended in the moving direction of the shutter member 161.

The shutter mechanism 158 has a first guide portion 171 of the shutter member 161,
1 has a lock portion 175 for restricting the movement of the first member. As shown in FIG. 31, the cartridge body 151 is provided on the main surface of the upper shell with a display 177 such as an arrow indicating the direction of loading the recording / reproducing apparatus. Also,
As shown in FIG. 32, the cartridge main body 151 is provided with positioning holes 178a and 178b for positioning at a predetermined loading position in the recording / reproducing apparatus on both sides in the width direction. Further, the large-diameter disk cartridge 4 has display labels 179a and 179 for displaying recorded contents and the like on the main surface and the rear side surface of the cartridge body 151, respectively.
9b is provided.

The operation of the shutter member 161 for opening and closing the recording / reproducing opening 156 and the table entry opening 155 in the large-diameter disk cartridge 4 configured as described above will be described with reference to the drawings. The large-diameter disk cartridge 4 is mounted on the stationary recording / reproducing apparatus 1 described above.
Recording and reproduction are performed by applying only to the 36.

When the large-diameter disk cartridge 4 is loaded into the stationary recording / reproducing apparatus 136, the shutter member 161 is moved to the open position corresponding to the turntable 147 with respect to the table entry opening 155 of the cartridge body 151. Stop. That is, the table entry opening 1
55, the shutter member 161 is fully opened, the opening amount of the moving direction of the shutter member 161, and the center of the radius (magneto-optical disc 9 to be than the radius S ₂ of the turntable 147 and the large, moved the shutter member 161 the moving direction and are parallel to the width) R ₂ of the shutter member 161 between one end of the.

Then, the large-diameter disk cartridge 4
When the shutter member 161 has opened the table entry opening 155, the shutter member 161 does not project from the side surface of the cartridge body 151.

As described above, according to the small-diameter disk cartridge 3, the shutter member 91 is moved to the first open position or the second open position in accordance with the portable and stationary recording / reproducing devices 135 and 136 to be loaded. To open the turntables 141 and 141 with different outer diameters.
147. Therefore, according to the small-diameter disk cartridge 3, the table entry opening 8
5 is formed relatively large, but it is possible to correspond to the stationary recording / reproducing device 136 without increasing the size of the portable recording / reproducing device 135.

Although the disc cartridge according to the present invention employs a magneto-optical disc as a disc-shaped recording medium, other disc-shaped discs such as a magnetic disc and an optical disc having a plurality of stacked signal recording layers can be used. It goes without saying that a recording medium may be used.

[0116]

As described above, according to the disk cartridge of the present invention, during recording and / or reproduction, the shutter member is stopped at a plurality of open positions with respect to the recording and / or reproduction opening. The opening amount of the recording and / or reproducing opening can be selectively switched. Therefore, the disc cartridge can correspond to each of a plurality of different formats that require different sizes of the recording and / or reproducing openings.

Further, according to the disk cartridge of the present invention, the shutter member is stopped at a plurality of open positions with respect to the entrance opening during recording and / or reproduction, so that the opening amount of the entrance opening is reduced. Can be selectively switched. Therefore, the disc cartridge can correspond to a plurality of different formats that require different sizes of the entrance opening.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a small-diameter disk cartridge according to the present invention.

FIG. 2 is a perspective view showing the small-diameter disk cartridge as viewed from the bottom side.

FIG. 3 is a plan view showing the small-diameter disk cartridge.

FIG. 4 is a perspective view showing a state where the small-diameter disk cartridge is loaded in a portable recording / reproducing apparatus.

FIG. 5 is a plan view showing a state where a shutter member of the small-diameter disk cartridge is moved to a first open position.

FIG. 6 is a perspective view showing a state where the small-diameter disk cartridge is loaded in a stationary recording / reproducing apparatus.

FIG. 7 is a plan view showing a state in which a shutter member of the small-diameter disk cartridge has been moved to a second open position.

FIG. 8 is a perspective view showing the large-diameter disk cartridge.

FIG. 9 is a perspective view showing the large-diameter disk cartridge from the bottom side.

FIG. 10 is a plan view showing the large-diameter disk cartridge.

FIG. 11 is a perspective view showing a state where the large-diameter disk cartridge is loaded in a stationary recording / reproducing apparatus.

FIG. 12 is a plan view showing a state where a shutter member of the large-diameter disk cartridge is opened.

FIG. 13 is a perspective view showing another small-diameter disk cartridge according to the present invention.

FIG. 14 is a perspective view showing the small-diameter disk cartridge from the bottom side.

FIG. 15 is a longitudinal sectional view showing the small-diameter disk cartridge.

FIG. 16 is an exploded perspective view showing the small-diameter disk cartridge.

FIG. 17 is an exploded perspective view for explaining a shutter mechanism of the small-diameter disk cartridge.

FIG. 18 is an exploded perspective view for explaining a shutter mechanism of the small-diameter disk cartridge.

FIG. 19 is a perspective view showing a lock portion provided in the shutter mechanism.

FIG. 20 is a perspective view illustrating a state in which the lock unit restricts movement of a shutter member.

FIG. 21 is a cross-sectional view showing a state in which the lock section restricts movement of a shutter member.

FIG. 22 is a perspective view showing a state in which the lock has released restriction on movement of the shutter member.

FIG. 23 is a cross-sectional view showing a state in which the lock section releases the restriction on the movement of the shutter member.

FIG. 24 is a perspective view showing a state where the small-diameter disk cartridge is loaded in a portable recording / reproducing apparatus.

FIG. 25 is a perspective view showing a state where the shutter member of the small-diameter disk cartridge has been moved to a first open position.

FIG. 26 is a perspective view showing a state where the small-diameter disk cartridge is loaded in a stationary recording / reproducing apparatus.

FIG. 27 is a perspective view showing a state where the small-diameter disk cartridge has been moved to a second open position.

FIG. 28 is a plan view showing a state where the small-diameter disk cartridge closes a recording / reproducing opening and a table entry opening.

FIG. 29 is a plan view showing a state where the small-diameter disk cartridge has been moved to a first open position.

FIG. 30 is a plan view showing a state where the small-diameter disk cartridge has been moved to a second open position.

FIG. 31 is a perspective view showing another large-diameter disk cartridge.

FIG. 32 is a perspective view showing the large-diameter disk cartridge from the bottom side.

FIG. 33 is a perspective view showing a conventional disk cartridge.

FIG. 34 is a perspective view showing a conventional disk cartridge from the bottom side.

FIG. 35 is a longitudinal sectional view of a magneto-optical disk provided in a conventional disk cartridge.

FIG. 36 is a perspective view showing a state where a shutter member of a conventional disk cartridge is moved.

FIG. 37 is a perspective view showing a conventional disk case.

FIG. 38 is a perspective view showing a conventional disk case from the bottom side.

FIG. 39 is a perspective view showing a conventional disk case.

[Explanation of symbols]

1 disk cartridge, 6 magneto-optical disk, 11
Cartridge body, 15 Table entry opening, 1
6 Recording / reproducing opening, 21 Shutter member

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsuru Nagasaka 6-35, Kita-Shinagawa, Shinagawa-ku, Tokyo Inside Sony Corporation (72) Inventor Akira Shimadzu 6-35, Kita-Shinagawa, Shinagawa-ku, Tokyo Sony Corporation

Claims (9)

[Claims] 1. A cartridge body for accommodating a disc-shaped recording medium, and a recording and / or reproducing apparatus for exposing a signal recording area of the disc-shaped recording medium to recording and / or reproducing means on a recording and / or reproducing apparatus side. An opening; and a shutter member provided to open and close the recording and / or reproducing opening. The shutter member has an opening amount of the recording and / or reproducing opening during recording and / or reproduction. Characterized in that the disc cartridge is selectively stopped at a plurality of open positions for making the disc cartridges different from each other. 2. The shutter member, in a state where the recording and / or reproducing opening is fully opened, one end of the shutter member in the moving direction of the shutter member is located outward of a projection area of a main surface of the cartridge body. The disk cartridge according to claim 1, wherein the disk cartridge is protruded. 3. The shutter member has a first opening position for fully opening the recording and / or reproducing opening, and a second opening position for substantially half opening the recording and / or reproducing opening. 3. The disk cartridge according to claim 2, wherein one end in the moving direction substantially coincides with the outer periphery of the main surface of the cartridge main body in the state of the second open position. 4. The cartridge body has a drive opening for driving a disc-shaped recording medium to enter into the cartridge body, and the shutter member is provided in accordance with each open position. 2. The disk cartridge according to claim 1, wherein the opening amounts of the entry openings are different from each other. 5. The disk cartridge according to claim 1, wherein said disk cartridge has a cartridge body for accommodating a plurality of disk-shaped recording media having different outer diameters. The disk cartridge according to claim 1, wherein 6. A cartridge body for accommodating a disc-shaped recording medium, and a recording and / or reproducing apparatus for exposing a signal recording area of the disc-shaped recording medium to recording and / or reproducing means on a recording and / or reproducing apparatus side. An opening; an opening for driving means for rotating and driving the disc-shaped recording medium into the cartridge body; an opening for recording and / or reproduction; and an opening for opening, which are openable and closable. A disk member, wherein the shutter member is selectively stopped at a plurality of open positions for varying the opening amount of the entrance opening during recording and / or reproduction. . 7. In the shutter member, one end of the shutter member in the moving direction is projected outward from a projected area of a main surface of the cartridge body in a state where the entrance opening is fully opened. 7. The disk cartridge according to claim 6, wherein: 8. The shutter member is selectively stopped at a first opening position for fully opening the entrance opening and a second opening position for substantially half-opening the entrance opening, 8. The disk cartridge according to claim 7, wherein in the state of the second open position, one end in the moving direction substantially coincides with the outer periphery of the main surface of the cartridge body. 9. The disc cartridge according to claim 1, wherein the disc cartridge has a cartridge body for accommodating a plurality of disc-shaped recording media having different outer diameters. The disk cartridge according to claim 6, wherein